blackheart — /blak hahrt /, n. 1. Plant Pathol. a nonparasitic disease of plants, as of potatoes and various trees, in which internal plant tissues blacken, usually as a result of extremes in temperature. 2. Hort. a. a heart cherry having a dark skin. b. the… … Universalium

blackheart — black•heart [[t]ˈblækˌhɑrt[/t]] n. ppa a disease of plants in which internal plant tissues blacken, usu. as a result of extremes in temperature • Etymology: 1700–10 … From formal English to slang